<template>
  <view class="smt-navbar" :class="{ 'smt-dark': dark }">
    <view
      :class="{
        'smt-navbar--fixed': fixed,
        'smt-navbar--shadow': shadow,
        'smt-navbar--border': border,
      }"
      :style="{ 'background-color': themeBgColor }"
      class="smt-navbar__content"
    >
      <status-bar v-if="statusBar" />
      <view
        :style="{
          color: themeColor,
          backgroundColor: themeBgColor,
          height: navbarHeight,
        }"
        class="smt-navbar__header"
      >
        <view
          @tap="onClickLeft"
          class="smt-navbar__header-btns smt-navbar__header-btns-left"
          :style="{ width: leftIconWidth }"
        >
          <slot name="left">
            <view class="smt-navbar__content_view" v-if="leftIcon.length > 0">
              <smt-icons :color="themeColor" :type="leftIcon" size="20" />
            </view>
            <view
              :class="{ 'smt-navbar-btn-icon-left': !leftIcon.length > 0 }"
              class="smt-navbar-btn-text"
              v-if="leftText.length"
            >
              <text :style="{ color: themeColor, fontSize: '12px' }">{{
                leftText
              }}</text>
            </view>
          </slot>
        </view>
        <view class="smt-navbar__header-container" @tap="onClickTitle">
          <slot>
            <view
              class="smt-navbar__header-container-inner"
              v-if="title.length > 0"
            >
              <text
                class="smt-nav-bar-text smt-ellipsis-1"
                :style="{ color: themeColor }"
                >{{ title }}</text
              >
            </view>
          </slot>
        </view>
        <view
          @click="onClickRight"
          class="smt-navbar__header-btns smt-navbar__header-btns-right"
          :style="{ width: rightIconWidth }"
        >
          <slot name="right">
            <view v-if="rightIcon.length">
              <smt-icons :color="themeColor" :type="rightIcon" size="22" />
            </view>
            <view
              class="smt-navbar-btn-text"
              v-if="rightText.length && !rightIcon.length"
            >
              <text
                class="smt-nav-bar-right-text"
                :style="{ color: themeColor }"
                >{{ rightText }}</text
              >
            </view>
          </slot>
        </view>
      </view>
    </view>
    <view class="smt-navbar__placeholder" v-if="fixed">
      <status-bar v-if="statusBar" />
      <view
        class="smt-navbar__placeholder-view"
        :style="{ height: navbarHeight }"
      />
    </view>
  </view>
</template>

<script>
import statusBar from "./smt-status-bar.vue";
const getVal = (val) => (typeof val === "number" ? val + "px" : val);

/**
 * NavBar 自定义导航栏
 * @description 导航栏组件，主要用于头部导航
 * @tutorial https://ext.dcloud.net.cn/plugin?id=52
 * @property {Boolean} dark 开启黑暗模式
 * @property {String} title 标题文字
 * @property {String} leftText 左侧按钮文本
 * @property {String} rightText 右侧按钮文本
 * @property {String} leftIcon 左侧按钮图标（图标类型参考 [Icon 图标](http://ext.dcloud.net.cn/plugin?id=28) type 属性）
 * @property {String} rightIcon 右侧按钮图标（图标类型参考 [Icon 图标](http://ext.dcloud.net.cn/plugin?id=28) type 属性）
 * @property {String} color 图标和文字颜色
 * @property {String} backgroundColor 导航栏背景颜色
 * @property {Boolean} fixed = [true|false] 是否固定顶部
 * @property {Boolean} statusBar = [true|false] 是否包含状态栏
 * @property {Boolean} shadow = [true|false] 导航栏下是否有阴影
 * @event {Function} clickLeft 左侧按钮点击时触发
 * @event {Function} clickRight 右侧按钮点击时触发
 * @event {Function} clickTitle 中间标题点击时触发
 */
export default {
  name: "SmtNavBar",
  components: {
    statusBar,
  },
  emits: ["clickLeft", "clickRight", "clickTitle"],
  props: {
    dark: {
      type: Boolean,
      default: false,
    },
    title: {
      type: String,
      default: "",
    },
    leftText: {
      type: String,
      default: "",
    },
    rightText: {
      type: String,
      default: "",
    },
    leftIcon: {
      type: String,
      default: "",
    },
    rightIcon: {
      type: String,
      default: "",
    },
    fixed: {
      type: [Boolean, String],
      default: false,
    },
    color: {
      type: String,
      default: "",
    },
    backgroundColor: {
      type: String,
      default: "",
    },
    statusBar: {
      type: [Boolean, String],
      default: false,
    },
    shadow: {
      type: [Boolean, String],
      default: false,
    },
    border: {
      type: [Boolean, String],
      default: true,
    },
    height: {
      type: [Number, String],
      default: 44,
    },
    leftWidth: {
      type: [Number, String],
      default: 60,
    },
    rightWidth: {
      type: [Number, String],
      default: 60,
    },
  },
  computed: {
    themeBgColor() {
      if (this.dark) {
        // 默认值
        if (this.backgroundColor) {
          return this.backgroundColor;
        } else {
          return this.dark ? "#333" : "#FFF";
        }
      }
      return this.backgroundColor || "#FFF";
    },
    themeColor() {
      if (this.dark) {
        // 默认值
        if (this.color) {
          return this.color;
        } else {
          return this.dark ? "#fff" : "#333";
        }
      }
      return this.color || "#333";
    },
    navbarHeight() {
      return getVal(this.height);
    },
    leftIconWidth() {
      return getVal(this.leftWidth);
    },
    rightIconWidth() {
      return getVal(this.rightWidth);
    },
  },
  mounted() {
    if (uni.report && this.title !== "") {
      uni.report("title", this.title);
    }
  },
  methods: {
    onClickLeft() {
      this.$emit("clickLeft");
    },
    onClickRight() {
      this.$emit("clickRight");
    },
    onClickTitle() {
      this.$emit("clickTitle");
    },
  },
};
</script>

<style lang="scss" scoped>
$nav-height: 44px;

.smt-navbar {
  // box-sizing: border-box;
}

.smt-nav-bar-text {
  /* #ifdef APP-PLUS */
  font-size: 34rpx;
  /* #endif */
  /* #ifndef APP-PLUS */
  font-size: 14px;
  /* #endif */
}

.smt-nav-bar-right-text {
  font-size: 12px;
}

.smt-navbar__content {
  position: relative;
  // background-color: #fff;
  // box-sizing: border-box;
  background-color: transparent;
}

.smt-navbar__content_view {
  // box-sizing: border-box;
}

.smt-navbar-btn-text {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  line-height: 12px;
}

.smt-navbar__header {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  padding: 0 10px;
  flex-direction: row;
  height: $nav-height;
  font-size: 12px;
}

.smt-navbar__header-btns {
  /* #ifndef APP-NVUE */
  overflow: hidden;
  display: flex;
  /* #endif */
  flex-wrap: nowrap;
  flex-direction: row;
  width: 120rpx;
  // padding: 0 6px;
  justify-content: center;
  align-items: center;
  /* #ifdef H5 */
  cursor: pointer;
  /* #endif */
}

.smt-navbar__header-btns-left {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  width: 120rpx;
  justify-content: flex-start;
  align-items: center;
}

.smt-navbar__header-btns-right {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: row;
  // width: 150rpx;
  // padding-right: 30rpx;
  justify-content: flex-end;
  align-items: center;
}

.smt-navbar__header-container {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex: 1;
  padding: 0 10px;
  overflow: hidden;
}

.smt-navbar__header-container-inner {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex: 1;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  overflow: hidden;
  // box-sizing: border-box;
}

.smt-navbar__placeholder-view {
  height: $nav-height;
}

.smt-navbar--fixed {
  position: fixed;
  z-index: 998;
  /* #ifdef H5 */
  left: var(--window-left);
  right: var(--window-right);
  /* #endif */
  /* #ifndef H5 */
  left: 0;
  right: 0;
  /* #endif */
}

.smt-navbar--shadow {
  box-shadow: 0 1px 6px #ccc;
}

.smt-navbar--border {
  border-bottom-width: 1rpx;
  border-bottom-style: solid;
  border-bottom-color: #eee;
}

.smt-ellipsis-1 {
  overflow: hidden;
  /* #ifndef APP-NVUE */
  white-space: nowrap;
  text-overflow: ellipsis;
  /* #endif */
  /* #ifdef APP-NVUE */
  lines: 1;
  text-overflow: ellipsis;
  /* #endif */
}

// 暗主题配置
.smt-dark {
}
</style>
